12-01-2014, 06:16 PM
A lot of uppers are out of square as the norm. Parts suppliers and rifle builders don't often care about the pursuit of common decency when making guns, so as long as it looks like a recognizable part, it's good enough for them.
Yes, you can bed with Blue Loc-tite, which is probably the most common method.
I have an old Colt SP-1 slickside upper that is perfectly square when I checked it with the tool. I don't lap if the face is square already. Extension tunnels come in varying sizes, as do barrel extensions. This can manifest in different types of fitting, tight or loose, depending on the how the tolerances stack.
Barrel nuts and extensions are out of square often as well.
Yes, you can bed with Blue Loc-tite, which is probably the most common method.
I have an old Colt SP-1 slickside upper that is perfectly square when I checked it with the tool. I don't lap if the face is square already. Extension tunnels come in varying sizes, as do barrel extensions. This can manifest in different types of fitting, tight or loose, depending on the how the tolerances stack.
Barrel nuts and extensions are out of square often as well.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com